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https://bugs.freedesktop.org/show_bug.cgi?id=2229        
   
           Summary: glReadPixel (or glDrawPixel) causes segfaults
           Product: Mesa
           Version: CVS
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Drivers/DRI/r200
        AssignedTo: [email protected]
        ReportedBy: [EMAIL PROTECTED]


demos/readpix will segfault when moving the window completely out of the screen
(I pushed it to bottom/left).
With R200_DEBUG set to pixel, this is what I got:
r200ReadPixels
r200TryReadPixels
r200TryReadPixels: dest not GART
r200DrawPixels
r200TryDrawPixels
r200TryDrawPixels: not GART memory
r200DrawPixels
r200TryDrawPixels
r200TryDrawPixels: not GART memory
r200ReadPixels
r200TryReadPixels
r200TryReadPixels: dest not GART
Speicherzugriffsfehler

I have no backtrace unfortunately, be warned that the segfault obviously happens
after a LOCK_HARDWARE()...        
   
   
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